src/gallium/drivers/svga/svga_pipe_draw.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26
  27 #include "util/u_format.h"
  28 #include "util/u_inlines.h"
  29 #include "util/u_prim.h"
  30 #include "util/u_time.h"
  31 #include "util/u_upload_mgr.h"
  32 #include "indices/u_indices.h"
  33
  34 #include "svga_hw_reg.h"
  35 #include "svga_cmd.h"
  36 #include "svga_context.h"
  37 #include "svga_screen.h"
  38 #include "svga_draw.h"
  39 #include "svga_state.h"
  40 #include "svga_swtnl.h"
  41 #include "svga_debug.h"
  42 #include "svga_resource_buffer.h"
  43
  44
  45 /**
  46  * Determine the ranges to upload for the user-buffers referenced
  47  * by the next draw command.
  48  *
  49  * TODO: It might be beneficial to support multiple ranges. In that case,
  50  * the struct svga_buffer::uploaded member should be made an array or a
  51  * list, since we need to account for the possibility that different ranges
  52  * may be uploaded to different hardware buffers chosen by the utility
  53  * upload manager.
  54  */
  55 static void
  56 svga_user_buffer_range(struct svga_context *svga,
  57                        unsigned start,
  58                        unsigned count,
  59                        unsigned instance_count)
  60 {
  61    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
  62    unsigned i;
  63
  64    /*
  65     * Release old uploaded range (if not done already) and
  66     * initialize new ranges.
  67     */
  68
  69    for (i=0; i < svga->curr.velems->count; i++) {
  70       struct pipe_vertex_buffer *vb =
  71          &svga->curr.vb[ve[i].vertex_buffer_index];
  72
  73       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
  74          struct svga_buffer *buffer = svga_buffer(vb->buffer);
  75
  76          pipe_resource_reference(&buffer->uploaded.buffer, NULL);
  77          buffer->uploaded.start = ~0;
  78          buffer->uploaded.end = 0;
  79       }
  80    }
  81
  82    for (i=0; i < svga->curr.velems->count; i++) {
  83       struct pipe_vertex_buffer *vb =
  84          &svga->curr.vb[ve[i].vertex_buffer_index];
  85
  86       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
  87          struct svga_buffer *buffer = svga_buffer(vb->buffer);
  88          unsigned first, size;
  89          unsigned instance_div = ve[i].instance_divisor;
  90          unsigned elemSize = util_format_get_blocksize(ve[i].src_format);
  91
  92          svga->dirty |= SVGA_NEW_VBUFFER;
  93
  94          if (instance_div) {
  95             first = ve[i].src_offset;
  96             count = (instance_count + instance_div - 1) / instance_div;
  97             size = vb->stride * (count - 1) + elemSize;
  98          } else {
  99             first = vb->stride * start + ve[i].src_offset;
 100             size = vb->stride * (count - 1) + elemSize;
 101          }
 102
 103          buffer->uploaded.start = MIN2(buffer->uploaded.start, first);
 104          buffer->uploaded.end = MAX2(buffer->uploaded.end, first + size);
 105       }
 106    }
 107 }
 108
 109
 110 /**
 111  * svga_upload_user_buffers - upload parts of user buffers
 112  *
 113  * This function streams a part of a user buffer to hw and fills
 114  * svga_buffer::uploaded with information on the upload.
 115  */
 116 static int
 117 svga_upload_user_buffers(struct svga_context *svga,
 118                          unsigned start,
 119                          unsigned count,
 120                          unsigned instance_count)
 121 {
 122    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
 123    unsigned i;
 124    int ret;
 125
 126    svga_user_buffer_range(svga, start, count, instance_count);
 127
 128    for (i=0; i < svga->curr.velems->count; i++) {
 129       struct pipe_vertex_buffer *vb =
 130          &svga->curr.vb[ve[i].vertex_buffer_index];
 131
 132       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
 133          struct svga_buffer *buffer = svga_buffer(vb->buffer);
 134
 135          /*
 136           * Check if already uploaded. Otherwise go ahead and upload.
 137           */
 138
 139          if (buffer->uploaded.buffer)
 140             continue;
 141
 142          ret = u_upload_buffer( svga->upload_vb,
 143                                 0,
 144                                 buffer->uploaded.start,
 145                                 buffer->uploaded.end - buffer->uploaded.start,
 146                                 &buffer->b.b,
 147                                 &buffer->uploaded.offset,
 148                                 &buffer->uploaded.buffer);
 149
 150          if (ret)
 151             return ret;
 152
 153          if (0)
 154             debug_printf("%s: %d: orig buf %p upl buf %p ofs %d sofs %d"
 155                          " sz %d\n",
 156                          __FUNCTION__,
 157                          i,
 158                          buffer,
 159                          buffer->uploaded.buffer,
 160                          buffer->uploaded.offset,
 161                          buffer->uploaded.start,
 162                          buffer->uploaded.end - buffer->uploaded.start);
 163
 164          vb->buffer_offset = buffer->uploaded.offset;
 165       }
 166    }
 167
 168    return PIPE_OK;
 169 }
 170
 171
 172 /**
 173  * svga_release_user_upl_buffers - release uploaded parts of user buffers
 174  *
 175  * This function releases the hw copy of the uploaded fraction of the
 176  * user-buffer. It's important to do this as soon as all draw calls
 177  * affecting the uploaded fraction are issued, as this allows for
 178  * efficient reuse of the hardware surface backing the uploaded fraction.
 179  *
 180  * svga_buffer::source_offset is set to 0, and svga_buffer::uploaded::buffer
 181  * is set to 0.
 182  */
 183 static void
 184 svga_release_user_upl_buffers(struct svga_context *svga)
 185 {
 186    unsigned i;
 187    unsigned nr;
 188
 189    nr = svga->curr.num_vertex_buffers;
 190
 191    for (i = 0; i < nr; ++i) {
 192       struct pipe_vertex_buffer *vb = &svga->curr.vb[i];
 193
 194       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
 195          struct svga_buffer *buffer = svga_buffer(vb->buffer);
 196
 197          /* The buffer_offset is relative to the uploaded buffer.
 198           * Since we're discarding that buffer we need to reset this offset
 199           * so it's not inadvertantly applied to a subsequent draw.
 200           *
 201           * XXX a root problem here is that the svga->curr.vb[] information
 202           * is getting set both by gallium API calls and by code in
 203           * svga_upload_user_buffers().  We should instead have two copies
 204           * of the vertex buffer information and choose between as needed.
 205           */
 206          vb->buffer_offset = 0;
 207
 208          buffer->uploaded.start = ~0;
 209          buffer->uploaded.end = 0;
 210          if (buffer->uploaded.buffer)
 211             pipe_resource_reference(&buffer->uploaded.buffer, NULL);
 212       }
 213    }
 214 }
 215
 216
 217
 218 static enum pipe_error
 219 retry_draw_range_elements( struct svga_context *svga,
 220                            struct pipe_resource *index_buffer,
 221                            unsigned index_size,
 222                            int index_bias,
 223                            unsigned min_index,
 224                            unsigned max_index,
 225                            unsigned prim,
 226                            unsigned start,
 227                            unsigned count,
 228                            unsigned instance_count,
 229                            boolean do_retry )
 230 {
 231    enum pipe_error ret = PIPE_OK;
 232
 233    svga_hwtnl_set_unfilled( svga->hwtnl,
 234                             svga->curr.rast->hw_unfilled );
 235
 236    svga_hwtnl_set_flatshade( svga->hwtnl,
 237                              svga->curr.rast->templ.flatshade,
 238                              svga->curr.rast->templ.flatshade_first );
 239
 240    ret = svga_upload_user_buffers( svga, min_index + index_bias,
 241                                    max_index - min_index + 1, instance_count );
 242    if (ret != PIPE_OK)
 243       goto retry;
 244
 245    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 246    if (ret != PIPE_OK)
 247       goto retry;
 248
 249    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
 250                                          index_buffer, index_size, index_bias,
 251                                          min_index, max_index,
 252                                          prim, start, count );
 253    if (ret != PIPE_OK)
 254       goto retry;
 255
 256    return PIPE_OK;
 257
 258 retry:
 259    svga_context_flush( svga, NULL );
 260
 261    if (do_retry)
 262    {
 263       return retry_draw_range_elements( svga,
 264                                         index_buffer, index_size, index_bias,
 265                                         min_index, max_index,
 266                                         prim, start, count,
 267                                         instance_count, FALSE );
 268    }
 269
 270    return ret;
 271 }
 272
 273
 274 static enum pipe_error
 275 retry_draw_arrays( struct svga_context *svga,
 276                    unsigned prim,
 277                    unsigned start,
 278                    unsigned count,
 279                    unsigned instance_count,
 280                    boolean do_retry )
 281 {
 282    enum pipe_error ret;
 283
 284    svga_hwtnl_set_unfilled( svga->hwtnl,
 285                             svga->curr.rast->hw_unfilled );
 286
 287    svga_hwtnl_set_flatshade( svga->hwtnl,
 288                              svga->curr.rast->templ.flatshade,
 289                              svga->curr.rast->templ.flatshade_first );
 290
 291    ret = svga_upload_user_buffers( svga, start, count, instance_count );
 292
 293    if (ret != PIPE_OK)
 294       goto retry;
 295
 296    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 297    if (ret != PIPE_OK)
 298       goto retry;
 299
 300    ret = svga_hwtnl_draw_arrays( svga->hwtnl, prim,
 301                                  start, count );
 302    if (ret != PIPE_OK)
 303       goto retry;
 304
 305    return PIPE_OK;
 306
 307 retry:
 308    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 309    {
 310       svga_context_flush( svga, NULL );
 311
 312       return retry_draw_arrays( svga,
 313                                 prim,
 314                                 start,
 315                                 count,
 316                                 instance_count,
 317                                 FALSE );
 318    }
 319
 320    return ret;
 321 }
 322
 323
 324 static void
 325 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 326 {
 327    struct svga_context *svga = svga_context( pipe );
 328    unsigned reduced_prim = u_reduced_prim( info->mode );
 329    unsigned count = info->count;
 330    enum pipe_error ret = 0;
 331    boolean needed_swtnl;
 332
 333    if (!u_trim_pipe_prim( info->mode, &count ))
 334       return;
 335
 336    /*
 337     * Mark currently bound target surfaces as dirty
 338     * doesn't really matter if it is done before drawing.
 339     *
 340     * TODO If we ever normaly return something other then
 341     * true we should not mark it as dirty then.
 342     */
 343    svga_mark_surfaces_dirty(svga_context(pipe));
 344
 345    if (svga->curr.reduced_prim != reduced_prim) {
 346       svga->curr.reduced_prim = reduced_prim;
 347       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 348    }
 349
 350    needed_swtnl = svga->state.sw.need_swtnl;
 351
 352    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 353
 354 #ifdef DEBUG
 355    if (svga->curr.vs->base.id == svga->debug.disable_shader ||
 356        svga->curr.fs->base.id == svga->debug.disable_shader)
 357       return;
 358 #endif
 359
 360    if (svga->state.sw.need_swtnl) {
 361       if (!needed_swtnl) {
 362          /*
 363           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 364           * currently bound vertex buffers, some of which may already be
 365           * referenced in the current command buffer as result of previous HW
 366           * TNL. So flush now, to prevent the context to flush while a referred
 367           * vertex buffer is mapped.
 368           */
 369
 370          svga_context_flush(svga, NULL);
 371       }
 372
 373       /* Avoid leaking the previous hwtnl bias to swtnl */
 374       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 375       ret = svga_swtnl_draw_vbo( svga, info );
 376    }
 377    else {
 378       if (info->indexed && svga->curr.ib.buffer) {
 379          unsigned offset;
 380
 381          assert(svga->curr.ib.offset % svga->curr.ib.index_size == 0);
 382          offset = svga->curr.ib.offset / svga->curr.ib.index_size;
 383
 384          ret = retry_draw_range_elements( svga,
 385                                           svga->curr.ib.buffer,
 386                                           svga->curr.ib.index_size,
 387                                           info->index_bias,
 388                                           info->min_index,
 389                                           info->max_index,
 390                                           info->mode,
 391                                           info->start + offset,
 392                                           info->count,
 393                                           info->instance_count,
 394                                           TRUE );
 395       }
 396       else {
 397          ret = retry_draw_arrays( svga,
 398                                   info->mode,
 399                                   info->start,
 400                                   info->count,
 401                                   info->instance_count,
 402                                   TRUE );
 403       }
 404    }
 405
 406    /* XXX: Silence warnings, do something sensible here? */
 407    (void)ret;
 408
 409    svga_release_user_upl_buffers( svga );
 410
 411    if (SVGA_DEBUG & DEBUG_FLUSH) {
 412       svga_hwtnl_flush_retry( svga );
 413       svga_context_flush(svga, NULL);
 414    }
 415 }
 416
 417
 418 void svga_init_draw_functions( struct svga_context *svga )
 419 {
 420    svga->pipe.draw_vbo = svga_draw_vbo;
 421 }